Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 88 · 40 questions

The fast method (One-step multiplier): Increase by p%: multiply by (100 + p)% — up 20% is × 1.2. Decrease by p%: multiply by (100 − p)% — down 25% is × 0.75. Easy way to multiply: × the whole number (115 or 75), then ÷ 100.

1. 1.520 increased by 5% =
2. 2.360 increased by 50% =
3. 3.280 increased by 5% =
4. 4.700 increased by 12% =
5. 5.150 increased by 30% =
6. 6.364 increased by 25% =
7. 7.400 increased by 15% =
8. 8.620 increased by 50% =
9. 9.75 increased by 8% =
10. 10.276 increased by 25% =
11. 11.725 decreased by 8% =
12. 12.130 decreased by 30% =
13. 13.800 decreased by 8% =
14. 14.440 decreased by 75% =
15. 15.570 increased by 20% =
16. 16.445 increased by 20% =
17. 17.760 decreased by 75% =
18. 18.140 increased by 10% =
19. 19.460 decreased by 35% =
20. 20.100 increased by 8% =
21. 21.100 decreased by 20% =
22. 22.275 increased by 12% =
23. 23.640 decreased by 60% =
24. 24.450 increased by 8% =
25. 25.560 increased by 60% =
26. 26.184 increased by 50% =
27. 27.445 increased by 20% =
28. 28.502 increased by 50% =
29. 29.492 increased by 75% =
30. 30.790 decreased by 60% =
31. 31.525 decreased by 8% =
32. 32.60 increased by 5% =
33. 33.380 decreased by 25% =
34. 34.700 decreased by 8% =
35. 35.332 decreased by 25% =
36. 36.785 increased by 60% =
37. 37.380 decreased by 20% =
38. 38.700 increased by 5% =
39. 39.325 increased by 12% =
40. 40.360 decreased by 15% =

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